SeeMeCNC Rostock MAX v2 Assembly Manual page 52

Now get your thread locking compound and dribble a little bit on to the threads. I kind of over-
did it, but it'll work just fine.
Fig. 4-28: MOAR THRED COMPOUND!
Install the second grub screw using the same process you followed for the first.
Rostock MAX v2 Assembly Guide
Fig. 4-27: Pulley & grub screw aligned.
You'll want to use the included Allen
wrench to tighten down the grub screw. Wipe off
any excess thread locking compound after the
screw is tightened down.
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